I did this test about 10 years ago, with a P210-6 at a 50ft range. Premium 147gr hollowpoints tended to do the best (speer gold dot and whatever winchester was calling theirs at the time) -- I was able to get some 5-shot groups that could be covered with a quarter. I also recall that the 124gr gold dot load was very close to the same, so I ended up using that as a self-defense load. Bulk WWB 115gr practice ammo tended to do much worse, to the extent that groups looked about the same as those coming out of a Glock 19.